Dr. Tanja Bosak

Associate Professor of Geobiology
Contact: tbosak[at]
Bosak CV

Mirna 2015

Mirna Daye

Postdoctoral Associate
Contact: mdaye[at]

Understanding the different biogeochemical conditions that induce precipitation of carbonates and minerals in microbial mats is the key for a better reconstruction of the mechanisms of the formation of fossil stromatolites found in the geological records. I am interested in the investigation of the different microbial populations and metabolisms conducive to the formation of stromatolites, in particular, the examination of anaerobic microbial consortium which promotes the precipitation of different minerals and carbonate build-ups.


Emily Matys

PhD Student in Geobiology
Contact: ematys[at]

Through organic geochemical and micropaleontological analysis, I study the information preserved in sedimentary archives. As part of the Bosak lab, I continue to characterize body fossils from the Neoproterozoic interglacial period to better understand early eukaryotic radiation and possible connections with the dramatic environmental change associated with the Sturtian low-latitude glaciation.

Kelsey MooreKelsey Moore

Graduate Student
Contact: krmoore[at]

 I am interested in early life on Earth and the evolution of microorganisms and their environments. My current research centers around Cryogenian microfossils found in post-Sturtian cap carbonates. Through microscopic and chemical analyses, I hope to gain insight into what these fossils represent and what they can tell us about ecology in the Cryogenian non-glacial interlude. I am also interested in early evolution of cyanobacteria on Earth and the reconstruction of phylogenetic trees and molecular clocks for this complex group of bacteria.


Sharon Newman

PhD Student in Geobiology
Contact: sharon.newman[at]

My current research focuses on microbe-mineral interactions. I employ a variety of microscopy techniques and chemical analyses to investigate the formation of minerals around microbial filaments. My goals are to explore the mechanisms of fossilization and to determine what depositional environments are most conducive to fossilization.

mihkelDr. Mihkel Pajusalu

Postdoctoral Associate
Contact: pajusalu[at]

Currently I am investigating how bacterial gas production and consumption vary dependent on atmospheric composition, mainly focusing on photosynthesis. The goal is to have a better estimate about how life could affect the atmosphere on an exoplanet and thereby provide better markers for detecting life in the universe.

Jeemin photo 2Jeemin Rhim

Graduate Student
Contact: jrhim[at]

My research interests span a range of topics including the geochemical processes that govern the Earth system as well as the origin and evolution of life. I am currently focusing on probing the formation condition of methane by analyzing methane “clumped isotope” (13CH3D) composition. In particular, I am interested in understanding how the effects of biological and non-biological processes manifest in the geochemical signatures.


Ana De Santiago Torio

Research Associate
Contact: anast[at]

I am passionate about microbiology. I’m currently interested in understanding how sulfate-reducing bacteria respond to variable environmental conditions, such as nutrient limitation, and how those changes affect their metabolism. Ultimately, this might give us an insight into how sediments are influenced by the microbes living in them.




Friends of the Lab

Gilad Antler

PhD Candidate, University of Cambridge.

Dr. Lilliam Casillas

Principal Investigator, Biology Department, University of Puerto Rico- Humacao.


Dr. Gill Geesey

Professor, Department of Microbiology, Montana State University


Dr. Bulent Icgen

Associate Professor, Department of Environmental Engineering, Middle East Technical University (Visiting Professor at MIT Summer ’15)


Elizabeth Johnson

Graduate Student, Department of Marine Earth and Atmospheric Sciences, North Carolina State University

Dr. Dan Lahr

Assistant Professor, University of São Paulo, Brazil

Dr. Francis Macdonald

Associate Professor, Harvard University

Eileen Malloy-Molzberger

Graduate Student, Department of Biochemistry, Duke University

Dr. Laura Meredith

NSF-AGS Postdoctoral Fellow, Stanford University

Dr. Kristen Miller

Postdoctoral Researcher, MIT

Dr. Sara Pruss

Associate Professor, Smith College.

Dr. Florence Schubotz

Postdoctoral Researcher, MARUM/University of Bremen

David Wang

PhD student at MIT



Former Members

Dr. Alexander J. Evans

Now a postdoctoral fellow at Columbia University – Lamont-Doherty Earth Observatory.


Kate Harris

Pursuing a project to cycle the silk road:

Matt Joss

Successfully defended his Master’s thesis in geobiology!

Dr. Biqing Liang

Now at Academia Sinica in Taiwan.

Dr. Giulio Mariotti

Currently an assistant professor at Louisiana State University.


Dr. Alexander Petroff

Now a postdoctoral fellow at Rockefeller University.

Dr. Min Sub Sim

Now at Agouron Postdoctoral Fellow at California Institute of Technology.

Dr. Stefanie Templer

Currently in Emmi, Switzerland.

Dr. Shikma Zaarur

Currently in New Zealand

Dr. Andras Zsom

Dara Science Associate at Brown University (will begin January 2016).

Former undergraduate students: Joan Chen, Rachel Harris, Diana LaScala-Gruenewald, Anastasia Maheras, Deepa, Rao, Kristen Whaley, Jose-Luis Lugo (U Puerto Rico), Kevin Gildea


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